arch/mips/jmr3927/common/puts.c

   1 /*
   2  *
   3  * BRIEF MODULE DESCRIPTION
   4  *      Low level uart routines to directly access a TX[34]927 SIO.
   5  *
   6  * Copyright 2001 MontaVista Software Inc.
   7  * Author: MontaVista Software, Inc.
   8  *              ahennessy@mvista.com or source@mvista.com
   9  *
  10  * Copyright (C) 2000-2001 Toshiba Corporation
  11  *
  12  * Based on arch/mips/au1000/common/puts.c
  13  *
  14  *  This program is free software; you can redistribute  it and/or modify it
  15  *  under  the terms of  the GNU General  Public License as published by the
  16  *  Free Software Foundation;  either version 2 of the  License, or (at your
  17  *  option) any later version.
  18  *
  19  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  20  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  21  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  22  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  23  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  24  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  25  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  26  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  27  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  28  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  *  You should have received a copy of the  GNU General Public License along
  31  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  32  *  675 Mass Ave, Cambridge, MA 02139, USA.
  33  */
  34
  35 #include <asm/jmr3927/tx3927.h>
  36
  37 #define TIMEOUT       0xffffff
  38
  39 void
  40 prom_putchar(char c)
  41 {
  42         int i = 0;
  43
  44         do {
  45             i++;
  46             if (i>TIMEOUT)
  47                 break;
  48         } while (!(tx3927_sioptr(1)->cisr & TXx927_SICISR_TXALS));
  49         tx3927_sioptr(1)->tfifo = c;
  50         return;
  51 }
  52
  53 void
  54 puts(const char *cp)
  55 {
  56     while (*cp)
  57         prom_putchar(*cp++);
  58     prom_putchar('\r');
  59     prom_putchar('\n');
  60 }